diff --git a/gns3server/modules/port_manager.py b/gns3server/modules/port_manager.py
index 76248cd7..0422e4ec 100644
--- a/gns3server/modules/port_manager.py
+++ b/gns3server/modules/port_manager.py
@@ -16,7 +16,6 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import socket
-import sys
 import ipaddress
 from aiohttp.web import HTTPConflict
 from gns3server.config import Config